CVE-2025-13547Public exploitNetwork attack vector

Authenticated code execution via unchecked submit-url copy

Published Nov 23, 2025 · Updated Nov 24, 2025

Stack-based buffer overflow in D-Link DIR-822K 1.00_20250513164613 and DWR-M920 1.1.50 allows remote authenticated users to execute code. The formDdns handler passes the HTTP submit-url parameter to strcpy in sub_458E40 or sub_463560 without checking the fixed destination buffer size. Authenticated network access to the management interface is required; an oversized POST can crash its web service or redirect execution on the router.

CVSS severity8.8
High
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in D-Link DIR-822K 1.00_20250513164613 and DWR-M920 1.1.50 allows remote authenticated users to execute code. The formDdns handler passes the HTTP submit-url parameter to strcpy in sub_458E40 or sub_463560 without checking the fixed destination buffer size. Authenticated network access to the management interface is required; an oversized POST can crash its web service or redirect execution on the router.

The record

CVE
CVE-2025-13547
Published
Nov 23, 2025
Updated
Nov 24, 2025
Vendor
D-Link
Product
DWR-M920
Classifications
CWE-119, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.00_20250513164613
  2. Affected versionversion=1.1.50

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

D-Link · DWR-M920version=1.00_20250513164613; version=1.1.50
D-Link · DIR-822Kversion=1.00_20250513164613; version=1.1.50

Published CVSS scores

7.4VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1210Exploitation of Remote Services

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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